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[aprssig] Re: D700A gps interface problem

KC2MMi kc2mmi at verizon.net
Tue Jul 20 18:06:18 UTC 2004


By comparison here's a log snippet from my DeLuo:

$GPGGA,090243.000,4041.0595,N,07332.4232,W,0,00,,,M,,M,,*57
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,1,1,04,11,54,059,,28,70,296,,31,37,065,,15,34,030,*75
$GPRMC,090243.000,V,4041.0595,N,07332.4232,W,,,270504,,*04
$GPGGA,090244.000,4041.0595,N,07332.4232,W,0,00,,,M,,M,,*50

and then those repeat. If I only could remember.<G> I think I turned off
several strings that APRS doesn't use, like the $GPGLL (which means $string,
GPglobalpositioning, LLlat/lon) and I'd expect Scott is right about the "V"
flag in yours. That's why GPSManager was recommended to me, btw, because it
allows you to program the hockey-pucks that have no interface software with
them.

Does your GPS have a clear sky view? Even with a 30-degree wide view up at
the sky, that's not enough for a GPS lock most of the time. A good 90-degree
view of the sky, all around, is about the minimum to expect a good lock
with. And on first powr-up, or if the unit's internal memory has gone flat,
the new ones can take 5+ minutes to get the first lock. Older models (like a
1987 Magellan) could take 45 minutes to get first lock!

If you have any GPS-interactive software running, most of it will have some
screen that shows GPS performance, i.e. "poor-fair-good" or "no satellites"
etc., in human-friendly form.

Jared

----- Original Message ----- 
From: <vxaprs at juno.com>
To: <kc2mmi at verizon.net>
Cc: <aprssig at lists.tapr.org>
Sent: Tuesday, July 20, 2004 1:07 PM
Subject: Re: [aprssig] Re: D700A gps interface problem



Here are the output strings from 4 gps after acquiring the sats. I think I
got a full cycle. All 4 work with the 2 old D700A, and all except the deluo
works with the new D700A I bought last month. I do not know what this stuff
means. A few things I notice about the deluo that are different from all of
the others:
1. Only the deluo has a "V" in the $GPRMC string.
2. All except the deluo has a $GPGLL string.
I have checked the cable and am getting a good signal at the stereo plug.
The same cable works fine with the other 2 D700A.
Thanks for all the input so far.

DELUO:
$GPRMC,144024.003,V,3859.8673,N,07709.1872,W,,,200704,,*0B
$GPGGA,144025.003,3859.8673,N,07709.1872,W,0,00,,,M,,M,,*5C
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,10,21,66,307,,26,58,046,41,18,45,293,38,09,27,154,*74
$GPGSV,3,2,10,06,23,212,,10,17,084,,29,45,045,35,17,17,132,*79
$GPGSV,3,3,10,15,16,306,36,22,15,274,*7E
$GPRMC,144025.003,V,3859.8673,N,07709.1872,W,,,200704,,*0A

GARMIN EMAP:
$GPRMC,152246,A,3900.1359,N,07709.2498,W,0.0,348.3,200704,10.8,W,A*23
$GPRMB,A,,,,,,,,,,,,A,A*0B
$GPGGA,152246,3900.1359,N,07709.2498,W,1,05,3.1,77.8,M,-34.0,M,,*49
$GPGSA,A,3,,,,,,15,,18,21,22,,29,4.6,3.1,1.8*3E
$GPGSV,3,1,12,03,09,312,00,06,08,202,00,09,43,140,00,10,04,094,00*7F
$GPGSV,3,2,12,14,06,234,00,15,34,314,41,17,01,140,00,18,58,317,45*7F
$GPGSV,3,3,12,21,79,244,38,22,28,292,35,26,39,045,40,29,28,048,39*77
$GPGLL,3900.1359,N,07709.2498,W,152246,A,A*59
$GPBOD,,T,,M,,*47
$PGRME,11.0,M,12.7,M,16.8,M*15
$PGRMZ,255,f,3*19
$PGRMM,WGS 84*06
$GPRTE,1,1,c,*37
$GPRMC,152248,A,3900.1382,N,07709.2496,W,0.0,348.3,200704,10.8,W,A*25

GARMIN III+:
$GPRMC,151323,A,3900.162,N,07709.262,W,000.0,360.0,200704,010.7,W*73
$GPRMB,A,,,,,,,,,,,,V*71
$GPGGA,151323,3900.162,N,07709.262,W,1,03,6.2,64.9,M,-34.0,M,,*41
$GPGSA,A,2,,,,,15,18,,,26,,,,6.2,6.2,*14
$GPGSV,3,1,10,03,08,314,00,06,11,204,00,09,39,144,41,10,06,091,00*7F
$GPGSV,3,2,10,15,30,314,35,18,55,310,46,21,78,268,39,22,25,288,39*72
$GPGSV,3,3,10,26,42,045,47,29,31,047,33,,,,,,,,*72
$PGRME,24.4,M,,M,24.4,M*00
$GPGLL,3900.160,N,07709.262,W,151323,A*3D
$PGRMZ,213,f,2*1A
$PGRMM,WGS 84*06
$GPBOD,,T,,M,,*47
$GPRTE,0,1,c,*36
$GPRMC,151325,A,3900.158,N,07709.261,W,000.0,360.0,200704,010.7,W*7F





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